ACM-21U-900-T
Common Mode Choke, ACM-21U Series, 90 ohm, 280 mA, 2 mm x 1.2 mm x 1.2mm
- Manufacturer: ABRACON
- Product type: SMD Common Mode Chokes / Filters
- SVHC: No SVHC (04-Feb-2026)
- Impedance: 90ohm
- Inductance: -
- Product Range: ACM-21U Series
- Product Width: 1.2mm
- Qualification: -
- Product Height: 1.2mm
- Product Length: 2mm
- DC Current Rating: 280mA
- DC Resistance Max: 0.4ohm
- Inductor Case / Package: 0805 [2012 Metric]
- Operating Temperature Max: 105°C
- Operating Temperature Min: -40°C
| Delivery and price | |
|---|---|
| Units per pack | 2000 |
| Price | 0.171 € |
| Current stock | 10+ |
| Lead time | 30 days |
## **Wire Wound Common Mode Choke for USB3.0** ACM-21U **Pb** SS Q
## 2.0 x 1.2 x 1.2mm or | | | | | | | | | | | | | | |
## **RoHS/RoHS II compliant**
**APPLICATIONS:**
## **FEATURES:**
- Small size and low profile
- High speed differential signal lines in USB3.0
- Virtually no effect on high speed signals due to suppressed differential mode impedance
- Elimination of common mode noise in high speed, differential mode signal transmission lines such as USB3.0
## **STANDARD SPECIFICATIONS**
|**STANDARD SPECIFICATIONS**<br>Abracon P/N:<br>ACM-21U<br>OperatingTemperature & Humidity:<br>Storage Temperature & Humidity:<br>-40˚C to +105˚C<br>-10˚C to +40˚C, Humidity < 70%RH (In tape and reel)<br>—~~—_—_—~~|**STANDARD SPECIFICATIONS**<br>Abracon P/N:<br>ACM-21U<br>OperatingTemperature & Humidity:<br>Storage Temperature & Humidity:<br>-40˚C to +105˚C<br>-10˚C to +40˚C, Humidity < 70%RH (In tape and reel)<br>—~~—_—_—~~|
|---|---|
|**Part Number**<br>**Impedance**<br>**@100MHz**<br>**DCR**<br>**IR**<br>**Rated**<br>**Voltage**|**Insulation**<br>**Resistance**|
|**Units**<br>**Ω± 25%**<br>**Ω (max.)**<br>**mA**<br>**Vdc**|**MΩ (min.)**|
|ACM-21U-900<br>90<br>0.40<br>280<br>20|10|
## **Test Conditions**
**Impedance (Common mode and differential mode):** LCR Meter Agilent 4287A/E4991A **DCR:** Agilent 4338B/34420
**IR:** Electric power, Electrical current meter, Thermometer
**Definition of Rated Current (IR):** The direct electric current as chip surface temperature rise just 20[o] C against chip initial surface temperature.
**Insertion Loss:** Network Analyzer Agilent E5071C
**Insulation Resistance:** High resistance meter Agilent 4339B
## **PART IDENTIFICATION:**
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ACM-21U- - Co) hu<br>{|<br>Impedance Code Packaging<br>Please refer to the Blank: bulk<br>table above T: Tape and Reel<br>= (2k pcs/reel)<br>**----- End of picture text -----**<br>
**LLC**
ABRACON
5101 Hidden Creek Ln Spicewood TX 78669 ABRACON IS Phone: 512-371-6159 | Fax: 512-351-8858 **REVISED: 06-3-20** ISO9001-2015 For terms and conditions of sales, please visit: CERTIFIED www.abracon.com |
2.0 x 1.2 x 1.2mm | | | | | | | | | | | | | | |
## **Wire Wound Common Mode Choke for USB3.0**
## ACM-21U
**Pb RoHS/RoHS II compliant**
## **ELECTRICAL CHARACTERISTIC CURVE:**
5101 Hidden Creek Ln Spicewood TX 78669 Phone: 512-371-6159 | Fax: 512-351-8858 **LLC** For terms and conditions of sales, please visit: www.abracon.com
ABRACON IS ISO9001-2015 CERTIFIED
**REVISED: 06-3-20**
2.0 x 1.2 x 1.2mm | | | | | | | | | | | | | | |
## **Wire Wound Common Mode Choke for USB3.0**
## ACM-21U
## **Pb RoHS/RoHS II compliant**
## **OUTLINE DIMENSIONS:**
**Recommended Land Pattern**
**Materials**
|**No.**|**Part Name**|**Material Name**|
|---|---|---|
|①|Lid|Ni-Zn Ferrite|
|②|Epoxy|Epoxyresin|
|③|Wire|Polyurethane system<br>enameled copper wire|
|④|Core|Ni-Zn Ferrite|
|⑤|Electrode<br>structure|(Ag-Pd)+Ni+Sn plating|
## **REFLOW PROFILE:**
- ∆ Preheat condition: 150~200 C/60~120sec.
- ∆ Allowed time above 217C: 60~90sec.
- ∆ Max temp: 260[o] C
- ∆ Max time at max temp: 10sec.
- ∆ Solder paste: Sn/3.0Ag/0.5Cu
- ∆ Allowed Reflow time: 2 times max.
5101 Hidden Creek Ln Spicewood TX 78669 Phone: 512-371-6159 | Fax: 512-351-8858 **LLC** For terms and conditions of sales, please visit: www.abracon.com
ABRACON IS ISO9001-2015 CERTIFIED
**REVISED: 06-3-20**
ACM-21U **Pb RoHS/RoHS II compliant** 2.0 x 1.2 x 1.2mm SS © | | | | | | | | | | | | | | |
## **Wire Wound Common Mode Choke for USB3.0**
**TAPE & REEL: 2000pcs/reel**
|A|B|P|K|T|
|---|---|---|---|---|
|1.55±0.2|2.25±0.2|4.0±0.1|1.45±0.1|0.2±0.1|
**Dimension: mm**
**ATTENTION:** tions. Abracon’s products are not specifically designed for Military, Aviation, Aerospace, Life-dependent Medical applications or any application requiring high reliability where component failure could result in loss of life and/or property. For applications requiring high reliability and/or presenting an extreme operating environment, written consent and authorization from Abracon LLC is required. Please contact Abracon LLC for more information.
5101 Hidden Creek Ln Spicewood TX 78669 ABRACON IS Phone: 512-371-6159 | Fax: 512-351-8858 **REVISED: 06-3-20** ISO9001-2015 **LLC** For terms and conditions of sales, please visit: CERTIFIED www.abracon.com ~~|~~
Updated at June 5, 2026
Abracon is an industry-leading manufacturer of passive components, specializing in frequency control, timing devices, RF and antenna solutions, and inductor technology. Through a commitment to quality and technical innovation, the company enables advanced IoT, data communication, industrial, medical, and aerospace applications. Abracon also powers a portfolio of trusted industry brands, including Ecliptek, Fox, ILSI, and ProAnt, delivering comprehensive solutions for modern engineering challenges. Globally recognized for its world-class frequency control devices, Abracon offers a vast selection of quartz crystals and standard oscillators engineered to provide exceptional stability and precision for critical circuitry. The comprehensive timing range also encompasses advanced MEMS oscillators, temperature-compensated (TCXO) and voltage-controlled (VC-TCXO) variants, alongside highly reliable resonators. Beyond timing components, Abracon excels in power management and connectivity. The company's magnetic and RF offerings include a substantial array of high-efficiency power inductors, specialized toroidal coils, and charging coils. To support seamless wireless communication and maintain signal integrity, Abracon provides a robust selection of RF antennas, single-band chip antennas, and common mode chokes designed for effective EMC and RFI suppression.
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